Not bright or distinct; wanting luminousness or clearness; obscure in luster or sound; dusky; darkish; obscure; indistinct; overcast; tarnished.
- Lacking in brightness: a dim room.
- Emitting only a small amount of light; faint: a dim lightbulb.
- Lacking luster; dull and subdued.
- Faintly outlined; indistinct: a dim figure in the distance.
- Obscure to the mind or the senses: a dim recollection of the accident.
- Lacking sharpness or clarity of understanding or perception. See Synonyms at dark.
- Lacking keenness or vigor.
- Negative, unfavorable, or disapproving: took a dim view of their prospects.
- Slang Dull; dimwitted.
- To make or become dim.
- A parking light on a motor vehicle.
- A low beam.
- Archaic Dusk.